AnswersHS Physical Science A - CR Summer School 2026Acids and Bases in Solution

Acids and Bases in Solution Answers

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A student is comparing two solutions. Solution A has a pH of 4 and solution B has a pH of 10. Which best describes the solutions?

A
Solution B is more acidic than solution A.
B
Solution A is more acidic than solution B.
C
Solution B has more hydrogen ions than solution A.
D
Solution A has more hydroxide ions than solution B.
2
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Heartburn is a form of indigestion felt as a burning sensation in the chest when stomach acid comes back up into the esophagus. Some people take an antacid to relieve heartburn.

A
The antacid is basic and will neutralize the base entering the esophagus.
B
The antacid is basic and will neutralize the acid entering the esophagus.
C
The antacid is acidic and will raise the pH of the esophagus.
D
The antacid is acidic and will lower the pH of the esophagus.
3

The equation shows reactants to a neutralization reaction.Ca2+ + OH– + H+ + NO

Question illustration
A
H+ binds with NO to make a salt.
Option A
B
H+ binds with Ca2+ to make an acid.
C
H+ binds with OH– to make water.
D
H+ binds with Ca2+ to make a base.
4

Apple juice has a lower pH than black coffee. Which best explains the relationship?

A
Apple juice has fewer hydrogen ions than black coffee.
B
Apple juice has more hydrogen ions than black coffee.
C
Apple juice has the same number of hydroxide ions as black coffee.
D
Apple juice has more hydroxide ions than black coffee.
5

Which would be least likely to completely dissolve in water?

A
hydrochloric acid
B
sulfuric acid
C
nitric acid
D
acetic acid
6

Which best describes the pH scale?

A
Acids measure below 7.
B
Bases measure below 7.
C
Acids and bases measure above 7.
D
Bases and acids measure at 7.
7

Which is the order of these solutions from strong acid to strong base?Solutions:household ammoniabattery acidbaking sodastomach acidantacid

A
stomach acid household ammonia battery acid antacid baking soda
Option A
B
battery acid stomach acid antacid baking soda household ammonia
Option B
C
battery acid stomach acid baking soda antacid household ammonia
Option C
D
stomach acid battery acid antacid baking soda household ammonia
Option D
8

Which solution has the greatest number of hydroxide ions?

A
baking soda, pH = 9
B
milk, pH = 6
C
tomato juice, pH = 3.5
D
vinegar, pH = 2
9

Which refers to a measure of how acidic or basic a solution is?

A
pH
B
solubility
C
reactiveness
D
hardness
10

A solution has a pH of 8. Which best describes the solution?

A
a strong acid
B
a strong base
C
a weak acid
D
a weak base

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